#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <math.h>
#define PI 3.141592
//2.44
int main()
{
	int x = 0;
	int y = 0;
	scanf("%d%d", &x, &y);
	printf("x*y=%d\n", x * y);
	printf("x+y=%d\n", x + y);
	printf("x-y=%d\n", x - y);
	printf("x%%y=%d\n", x % y);
	printf("x/y=%d\n", x / y);
	return 0;
}
//2.46
int main()
{
	double a = 0.0;
	double b = 0.0;
	double c = 0.0;
	scanf("%lf%lf%lf", &a, &b, &c);
	double C = (a + b + c)/2;
	double ret = sqrt(C * (C - a) * (C - b) * (C - c));
	printf("%f\n", ret);
	return 0;
}
//2.47
int main()
{
	double r = 3.4;
	double s = pow(r, 2) * PI;
	double c = 2 * PI * r;
	printf("s = %f,c = %f\n", s, c);
	return 0;
}
int main()
{
	double b = 35.425;
	double c = 53.954;
	int a1 = (int)b + (int)c;
	printf("%d", a1);
	return 0;
}
int main()
{
	char a = 'a';
	char b = 'b';
	char c = 'c';
	int d = (int)a + (int)b + (int)c;
	printf("%d", d);
	return 0;
}
int main()
{
	double min1 = 10.0;
	double v1 = 15.0;
	double v2 = 20.0;
	double min2 = 0.0;
	min2 = v1 * min1 / v2;
	printf("%f\n", min2);
	return 0;
}